1125123503 has 8 divisors (see below), whose sum is σ = 1286073120. Its totient is φ = 964228320.

The previous prime is 1125123479. The next prime is 1125123533. The reversal of 1125123503 is 3053215211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1125123503 - 2¹² = 1125119407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125123533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51413 + ... + 69953.

It is an arithmetic number, because the mean of its divisors is an integer number (160759140).

Almost surely, 2^1125123503 is an apocalyptic number.

1125123503 is a deficient number, since it is larger than the sum of its proper divisors (160949617).

1125123503 is an equidigital number, since it uses as much as digits as its factorization.

1125123503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27217.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1125123503 is about 33542.8606859940. The cubic root of 1125123503 is about 1040.0799688878.

Adding to 1125123503 its reverse (3053215211), we get a palindrome (4178338714).

The spelling of 1125123503 in words is "one billion, one hundred twenty-five million, one hundred twenty-three thousand, five hundred three".